Perspectives on spin hydrodynamics in ferromagnetic materials

TL;DR

This paper reviews the theoretical foundations of spin hydrodynamics in ferromagnetic materials, highlighting its potential for novel magnetization dynamics and long-distance information transport.

Contribution

It provides an overview of the exact mapping between Landau-Lifshitz equations and dispersive hydrodynamics, and discusses future research directions in spin transport applications.

Findings

Exact mapping between Landau-Lifshitz and hydrodynamic equations

Potential for long-distance magnetic information transport

Identification of challenges and future research avenues

Abstract

The field of spin hydrodynamics aims to describe magnetization dynamics from a fluid perspective. For ferromagnetic materials, there is an exact mapping between the Landau-Lifshitz equation and a set of dispersive hydrodynamic equations. This analogy provides ample opportunities to explore novel magnetization dynamics and magnetization states that can lead to applications relying entirely upon magnetic materials, for example, long-distance transport of information. This article provides an overview of the theoretical foundations of spin hydrodynamics and their physical interpretation in the context of spin transport. We discuss other proposed applications for spin hydrodynamics as well as our view on challenges and future research directions.